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AV > Gas Code Worksheet #1 #2 to edit > Flashcards

Gas Code Worksheet #1 #2 to edit Flashcards

1
Q

Which section of theCAN/CSA -B149.1-10 Code does the abbreviations sections follow?

A

TheDefinitionssection of theCAN/CSA -B149.1-15

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2
Q

Piping or tubing may be supported by any larger pipe in the system

A

False

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3
Q

Threaded Schedule 40 steel piping may be used for pressures not exceeding ____?

A

125psi

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4
Q

Underground piping systems shall be joined by means of

A

Welding and Compression

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5
Q

The volume of gas required for each appliance shall be determined from the appliance rating plate and/or the manufacturers specifications

A

True

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6
Q

Finish piping and appliance connections shall be checked under test pressure with either a soap solution or a leak detection device

A

False

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7
Q

An addition to an existing gas line is not subject to Table 6.3 when

A

Its less than 20 feet in length or its welded

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8
Q

Every hose and hose fitting shall have a minimum pressure rating of ___ psi

A

350

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9
Q

Natural Rubber may be used as a gasket material

A

False

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10
Q

A defective section of gas piping or tubing may be repaired by a qualified gasfitter

A

False

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11
Q

A hose may be used o connect a non vented appliance

A

Yes

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12
Q

When a piping system is purged outdoors the purge point must no terminate closer than 3 feet from a building or air intake

A

false

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13
Q

Underground piping or tubing shall not pass below

A

a foundation wall or under a building

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14
Q

Piping or tubing installed in aa commercial building shall be identified by ____at_____ intervals

A

Painting the entire gas line yellow
Yellow banding at 20ft intervals
Labelled or marked gas or propane at 20 foot intervals

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15
Q

A corrugated metal connector shall not exceed 2ft in length when connecting to a suspended appliance or a decorative appliance

A

true

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16
Q

A sleeve must be provided when piping or tubing passes through pavement in order to _____

A

Permit the free movement of the piping

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17
Q

When a shut off valve controls several systems it shall

A

Be readily acceptable
Have a handle installed
be protected from damage
be clearly marked

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18
Q

Plastic piping shall only be used underground service

A

true

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19
Q

Piping or tubing shall never be encased in ducts

A

false

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20
Q

Nesting of bushing is permitted on low pressure gas piping

A

False

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21
Q

The maximum range of a test gauge shall exceed the test pressure by at least 15% but not more than 30%

A

False

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22
Q

A girder beam or joist may be cut for in for installation piping

A

True

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23
Q

A street elbow or street tee may be used on low pressure gas piping

A

false

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24
Q

tubing run inside hollow walls within 1.75 “ of the surface shall be protected by 16 gauge plate or sleeves

A

true

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25
A corrugated metal connector may be used to connect a room heater
true
26
What is the maximum length of a metal connector for a range is
6 feet
27
Type L copper tubing may be used underground
true
28
When an existing piping or tubing system is of insufficient size for additional appliances, the extension shall run a separate line for the new appliance sized for the additional load to with 30 inches of the meter
false
29
A branch line must be the same diameter as the supply piping when
it supplies an unknown future supply connection
30
For a portable appliance a hose shall not exceed 75 ft in length
false
31
A 2" NPS welded gas line shall be tested to pressure of 50 PSI or 1.5 times the maximum operating pressure for 3 hours
True
32
A gas line operating a 10" W.C shall be designed to prevent the loss of no more than .5 "w.c
false
33
A tracer wire must accompanied plastic pipe when
It must always be used
34
A purge line shall be no larger than 3/4 " NPS for purging a line up to 4" NPS
False
35
Gas piping tubing and fittings may not be reused unless its a good as new condition and must have been used on gas before
true
36
A 12 inch NPS horizontal gas line must be supported every
8 meters
37
A vented appliance may be connected to the gas supply be a quick disconnect device
false
38
Piping or tubing may be used in lieu of wiring for an electric circuit when
in incorporates a flame detection device installed as part of the unit
39
Underground piping may be covered 24 hours before being tested
false
40
Threaded pipe les than 1/2" diameter shall be a minimum wall thickness of schedule 160 for natural gas
false
41
A piping outlet that is connected to an appliance shall terminated by means of
a plugged valve a cap a plug
42
Underground tubing systems shall be joined by means of brazing soldering compression and flaring
false
43
Piping or tubing may be installed in a false ceiling space used as return air plenum
true
44
piping or tubing shall be sleeved coated or double wrapped when passing through an outside masonry wall
true
45
A hose shall not be subjected to temperatures greater than
125F
46
A job fabricated weld fitting may be used in place of a manufactured weld fitting when the header is t least 3 1/2" NPS and the branch connection is larger than 3/4" but no larger than 50% of the header size
false
47
A dirt pocket shall be installed on the final drop to every appliance
false
48
A residential tubing system shall be identified at 6 foot intervals
true
49
Pressure and duration of tests shall be in accordance with table
6.3
50
The use of the left hand and right hand threaded coupling is not permitted on gas piping system
true
51
Piping or tubing shall be painted or coated when
they are installed outdoors | or they are installed in corrosive interiors indoors
52
Piping and tubing shall be located at least 3 feet below a commercial driveway or parking lot
false
53
For a permanent installation a hose shall not exceed 10 feet in length
true
54
After and appliance is connected before turning on the gas a check shall be made to ensure that al gas lines are installed as per code
false
55
the unthreaded portion of a piping outlet shall extend 25mm 1" through a ceiling or wall 50 mm through floor
true
56
Piping or tubing extending from one building to another shall have a shut off vavle located on the gas line just outside the building supplying the gas
false
57
piping used in a concealed location shall be a minimum of 3/8" NPS
false
58
at any point where piping or tubing through an outside wall below ground level a /an ust be provided
water tight seal
59
All factory wrapped or coated piping shall be tested to a minimum of 100psig
true
60
A construction heater shall be connected by a hose not exceeding __ but no less than __ in length
75 feet no less then 15 feet
61
A bushing may be used to reduce one pipe size when made of
steel
62
A drip pocket shall be provided where ____ minimum size
condensation may collect 3"
63
A test gauge face diameter min size
3"
64
Where should a manual appliance shut off valve be installed
in he drop or riser of commercial or industrial appliance in the drop or riser of res. appl. within 2ft of horizontal piping to a res. appl. within 50ft of a single residential appliance
65
Where a commercial appliance may be affected by vibration a ___ at be used
a hose connection at be used
66
a gas line 4" NPS or larger that has been tested with air must be purged with an ___ and then purged with ___
an inert gas and then purged with gas
67
tubing laid on a rooftop shall be supported
continuously with treated wood and planks
68
finsh piping and appliance connections shall be checked under ____ pressure
normal operating pressure
69
An addition an existing gas line is not subject to table 6.2 when ___
its not less than 20' long and is a welded tie in
70
A n4" NPS or larger gas line has to be purged with an inert gas because it is chemically no reactive whereas an air/gas mixture could be volatile
true
71
When the testing and purging of a gas line is complete an gas is introduced into the line what is the first check that the gas fitter should perform
watch the gas meter test dial for 10 mins to ensure there are no leaks
72
the Metric prefix deci stands for
one tenth
73
the abbreviation MPa indicates
a unit of Pressure
74
the term volatile is used to reference
how easily a gas mixes with air
75
2 gallons of propane liquid would weigh
10 pounds

AV (4 decks)

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